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Abstract

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ÀÎÀÚ¸¦ ¾Ë¾Æº¸±â À§ÇÔÀÌ´Ù.
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21ÀÏ¿¡¼­ 94 ÀÏ »çÀÌ¿¡ ½ÃÀ۵Ǿú°í 5-FU¿Í ACNU chemotherapy°¡ 4ÁÖ °£°ÝÀ¸·Î ½ÃÇàµÇ¾ú
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±¹¼Ò¸²ÇÁÀý·ÎÀÇ ÀüÀÌ¿©ºÎ, 4°³ ÀÌ»óÀÇ ÀÓÆļ± ÀüÀÌ, 6ÁÖÀÌ»óÀÇ ¼ö¼ú°ú ¹æ»ç¼±Ä¡·á ½ÃÀÛ »çÀÌ
ÀÇ °£°Ý ¹× 7ÀÏ ÀÌ»ó Áö¼ÓµÇ´Â ¹æ»ç¼±Ä¡·á ÅäÁßÀÇ È޽ıⰣ µîÀ̾ú´Ù.
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bowel wall penetrationÀÌ Àְųª ±¹¼Ò ¸²ÇÁÀýÀüÀÌ°¡ ÀÖÀ» ¶§´Â ±¹¼ÒÁ¦¾îÀ²µµ ȯÀÚÀÇ Àý¹Ý
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ÀÇ ±â°£ÀÌ ÇÊ¿äÀÌ»óÀ¸·Î ¿¬ÀåµÇ°Å³ª Ä¡·áÁß È޽ıⰣÀÌ »ý°Ü Àüüġ·á±â°£ÀÌ ±æ¾îÁöÁö ¾Ê°Ô
ÇÏ¿©¾ß ÇÒ °ÍÀÌ´Ù.

Purpose : To evaluate the results of the treatment of locally advanced but resectable
rectal cancers and to analyze prognostic factors, especially with the emphasis on the
treatment time factor.
Materials and Methods : There were 71 patients with rectal cancer who had been
treated by curative surgical procedure and postoperative radiotherapy from August 1989
to December 1993. The minimum follow up period was 24 months and the median
follow-up was 35 months. Radiation therapy had been given by 6 MV linear accelerator
by parallel opposing or four-box portals. Whole pelvis was treated up to 5040 cGy in
most cases. Systemic chemotherapy had been given in 94% of the patients, mostly with
5-FU/ACNU regimen. Assessment for the overall and disease-free survival rates were
done by life-table method and prognostic factors by Log-Rank tests.
Results : Five-year overall survival, disease-free survival were 58.8% and 57%,
respectively. Two-year local control rate was 76.6%. Stage according to Modified
Astler-Coiler (MAC) system, over 4 Positive lymph nodes, over 6 weeks interval
between definitive surgery and adjutant radiotherapy and over 7 days of interruption
during radiotherapy period were statistically significant, or borderline significant
prognostic factors.
Conclusion : The treatment results of patients with rectal cancers are comparable to
those of other large institutes. The treatment results for the patients with bowel wall
penetration and/or positive regional lymph nodes were still discouraging for their high
local recurrence rate for the patients with MAC 'C' stage diseases and high distant
metastases rate even for the patients with node-negative diseases. Maybe more effective
regimen of chemotherapy would be needed with proper route and schedule. To maximize
postoperative adjuvant treatment, radiotherapy should be started at least within 6 weeks
after surgery and preferably as soon as wound healing is completed. Interruption of
treatment during radiotherapy course affects disease-free survival badly, especially if
exceeds 7 days. So, the total treatment period from definitive surgery to the completion
of radiotherapy should be kept as minimal as possible.

Å°¿öµå

Rectal cancer; Postoperative radiotherapy; Overall treatment time;

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